i965/skl: Use larger URB size where available

Graphics / Mesa 3D Graphics Library / Mesa - Ben Widawsky [intel.com] - 21 September 2015 13:27 UTC

All SKL SKUs except the lowest one which has half the L3 size actually have 384K of URB per slice.

For once, I can explain how this mistake was made and how it was missed in review... Historically when we enable a platform and put the production sizes, you can simply look at the "smallest" SKU and see what its URB size is (and we assumed it was the 1 slice variant). Since on newer platforms the URB sizes are scaled automatically by HW, this was sufficient. On SKL, this is a bit different as the lowest SKU actually has half of the L3 fused off. GT2 is the 1 slice (not GT1) variant and it has 384K.

There are no Jenkins tests fixed (or regressions) and we don't expect any fixes here because you can always run with less URB size.

Thanks to Sarah for bringing this to my attention.

Cc: Sarah Sharp

c1e38ad i965/skl: Use larger URB size where available.
src/mesa/drivers/dri/i965/brw_device_info.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

Upstream: cgit.freedesktop.org

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